She may only be 21, but it seems that no one can tell Cara Delevingne what to do.

The star faced a furious showdown with model agency bosses after getting her latest tattoo – but she swiftly told them where to go.

The supermodel, who yesterday showed off the white inking – it’s on her right bicep and says “breathe deep” – was told she risked losing catwalk work if she continued on this Wentworth Miller (think Prison Break) path.

Apparently unconcerned, Cara made it clear that it is none of anyone else’s business – and calmly reminded the bosses that photos can be airbrushed.

I’m told: “Cara is without doubt the world’s most tattooed high profile model.